Crushing machine



June 25, 1940. H. c. GRIESEDIECK 2,205,350

CRUSHING MACHINE Filed Aug. 1. 1938 Patented June 25, 1940 UNITED STATES PATENT OFFICE CRUSHING MACHINE Application August 1, 1938, Serial No. 222,341

10 Claims.

This invention relates to crushing machines of the type wherein the material is reduced by the combined pounding and crushing action of heavy rings loosely supported on a rotating carrier.

The material produced by the above machine contains a large percentage of fine particles and powder and is quite satisfactory for some uses. For other uses, however, this finely comminuted or pulverized material is quite objectionable.

The principal objects of the present invention are to adapt the above machine to produce material having a minimum amount of fine particles, to prevent packing of the material in the machine and to provide the rings with replaceable striking 1-) elements. The invention consists in a ring for grinding machines having a circular series of pick or chisel elements on its outer surface, it also consists in arranging saidelements in two circular series circumferentially offset or staggered with relation to each other, it also consists in removably mounting said elements on the ring and it also consists in the arrangements and combinations hereinafter described and claimed.

In the accompanying drawing, which forms :5 part of this specification and wherein like symbols refer to like parts wherever they occur;

Fig. 1 is a vertical transverse section through a crushing machine provided with striking rings embodying my invention;

Fig. 2 is an enlarged end view of one of the rings;

Fig. 3 is a side elevation of said ring;

Fig. 4 is a. fragmentary secton on the line t-d of Fig. 2;

Figs. 5 and 6 are side elevational views showing two different shapes of detachable striking elements; and

Fig. 7 is a fragmentary edge view of said ring with the pick elements removed therefrom.

Fig. 1 of the accompanying drawing illustrates my invention in connection with a crushing machine comprising a casing i, a shaft 2 journaled in ends thereof, a grinding concave 3 and grate bars 4 supported on an arcuate flange 5 at said ends, a carrier 6 keyed to said shaft, a series of circumferentially spaced rods I rotatable with said carrier and striking rings 8 loosely supported on said rods.

According to the present invention, each of the 50 rings 8 has a series of circumferentially spaced radially disposed grooves or channels 9 formed in each end face. The channels in one face of the ring 8 are preferably located opposite the spaces between the channels in the other end face of 55 said ring, whereby the two series of channels are oflset circumferentially with respect to each other. The side walls of each of said channels are preferably undercut, as at 10, and converge inwardly from the outer periphery of the ring to the inner periphery thereof. a.

Mounted in each of the channels 9 in each end' of the ring 8 is a striking element having a main body portion ii that is shaped to snugly fit said channel and is secured therein against movement radially outward of said ring preferably by means of rivets l2. Said striking element has a portion is that extends radially outwardly of the outer surface of the ring and is tapered to provide a pick point, as shown in Figs. 1 to 4, or shaped to provide a single chisel point M, as shown in Fig. 5 15 or a double or reversible chisel point I5, as shown in Fig. 6.

By the arrangement described, the rings rotate with the carrier and shatter the material with heavy rapid hammer blows while the pick or chisel points pierce, cut and further reduce the material and prevent packing thereof without the rolling and grinding actioin which produces most of the pulverized or finely comminuted material. The striking elements are rigidly heldin position on the rings and may be readily removed and replaced. The rings are particularly adapted for use in reducing nonabrasive materials such as coal, asphalt, bones and glue, and fibrous material such as asbestos, wood and rags whenever it is desiredto produce such materials with a minimum'amount of fine particles.

What I claim is:

l. A crusher ring of the type having a relatively large central opening for loose mounting on a rotatable carrier, said ring having a heavy annular body with a relatively large central opening for loose mounting on a rotary element of said machine and with a circular series of removable striking elements projecting outwardly from said ring, the outer end portions of said elements being flared and shaped to form double chisel points.

2. A crushing ring for crushing machines of the kind described, said ring having a heavy annular body with a relatively large central opening for loose mounting on a rotary element of said machine and withtwo series of circumferentially spaced pick points projecting radially beyond the outer surface of said ring, the pick points of one series being located opposite the spaces between the pick points of the other series.

3. A crusher ring for crushing machines of the kind described, said ring having a heavy annular body with a relatively large central opening for loose mounting on a. rotatable carrier and with a series of radially disposed circumferentially spaced channels in the end face of said ring and separate members mounted in said channels and having material reducing portions extending beyond the outer surface of said annular body.

4. A crusher ring of the type having a relatively large central opening for loose mounting on a rotatable carrier, said ring having an annular body with series of radially disposed circumferentially spaced-channels in the opposite end faces thereof, the channels of one series being located opposite the spaces between the channels of the other series, and members mounted in said channels and having material reducing portions extending beyond the outer surface of said annular body and tapered on all sides to form pick points.

5. A crusher ring of the'type having a relatively large central opening for loose mounting on a rotatable carrier, said ring having an annular body with a series of radially disposed circumferentially spaced channels in the end face thereof and members removably mounted in said channels and having material reducing portions: disposed beyond the outer surface of said annular body and tapered on all sides from said surface to the ends of said members.

6. A crusher ring of the type having a relatively large central opening for loose mounting on a rotatable carrier, said ring having an annular body having circumferentially spaced radially disposed channels in its opposite end faces whose side walls are undercut and converge inwardly towards the ring axis, and members having portions mounted in and shaped to fit said channels and material reducing portions extending beyond the outer periphery of said ring.

7. A crusher ring of the type having a relatively large central opening for loose mounting on a rotatable carrier, said ring having an annular body having circumferentially spaced radially disposed channels in its opposite end faces whose side walls are undercut and converge inwardly towards the ring axis, and members mounted in and shaped to fit said channels and having material reducing portions that extend beyond the outer periphery of said ring and taper towards their outer ends.

8. A crusher ring of the type having a relatively large central opening for loose mounting on a rotatable carrier, said 'ring having an annular 9. In combination with a crushing machine comprising a casing having grinding surfaces and a carrier rotatably mounted in said casing, and a circular series of crushing rings mounted on said carrier and adapted to cooperate with said grinding surfaces, each of said rings comprising a heavy annular body with a relatively large annular body with two series of circumferentially spaced pick points projecting radially beyond the outer surface of said ring, the pick points of one series beinglocated opposite the spaces between the pick points of the other series.

10. In combination with a crushing machine comprising a casing having a grinding surface and a. carrier rotatably mounted in said casing and a. circular series of crushing rings mounted on said carrier and adapted to cooperate with said grinding surfaces, each of said crushing rings comprising a heavy annular body with a. relatively large central opening for loose mounting on said carrier and with a series of radially disposed circumferentially spaced channels in the opposite end faces of said annular body, the channels of one series being located opposite the spaces between the channels of the other series, and members mounted in said channels and having material reducing portions extending beyond the outer surface of said annular body.

HENRY C. GRIESEDIECK. 

